Chapter 5: Configuring Standard Local Survivability (Sls); Sls Service - Avaya G250 Administration

Chapter 5: Configuring Standard Local
Standard Local Survivability (SLS) provides a local G250/G350 with a limited subset of MGC
functionality when there is no IP-routed WAN link available to an MGC, or no MGC is available.
SLS is not a replacement for ELS or LSP survivability, which offer full call-feature functionality
and full translations in the survivable mode. Instead, SLS is a cost-effective survivability
alternative offering limited call processing in survivable mode. Although the G250/G350 has an
option to host an S8300 Media Server in ICC or LSP mode, SLS offers both local survivability
and call control.
In contrast to the server-based survivability features, SLS operates entirely from the media
gateway and requires a data set comprised of Avaya Communication Manager translations
(Survivable ARS analysis and configuration data). This data set is compiled and distributed to a
group of devices using the Provisioning and Installation Manager (PIM). In the absence of PIM,
the data set can be configured manually from individual media gateways using CLI commands.
For instructions on configuring SLS, see

SLS service

Call capability for analog, DCP, and IP phones
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ISDN BRI/PRI trunk interfaces supported on the G250-DS1, G250-BRI, and G350
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gateways
Non-ISDN digital DS1 trunk interfaces supported on the G250-DS1 and G350 gateways
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Outbound dialing through the local PSTN (local trunk gateway) from analog, DCP, and IP
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phones
Inbound calls from each trunk to pre-configured local analog or IP phones that have
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registered
Direct Inward Dialing
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Multiple call appearances
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Hold and Call Transfer functions
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Contact closure feature
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Local call progress tones (dial tone, busy, etc.)
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Emergency Transfer Relay (ETR) in cases of power loss
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Auto fallback to primary MGC
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IP station registration
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Survivability (SLS)
Configuring SLS on page 115.
Issue 3 February 2007 99